Diagnostic Test

WARNING: This page is about a different car, the 2019 RAM 3500 HD and 2019 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR ACTIVE DTC
NOTE:
If DTCs P24D0, P24AE, U04A4, or U02A3 are present, perform the diagnostics for those DTCs before continuing with this one.
1. Ignition on, engine not running.
2. Using the scan tool, read DTCs.
  Is this DTC active?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
CHECK SYSTEM VOLTAGE
1. Check the Batteries and charging system for proper system voltage and operation.
  Is the system voltage normal?
  
  Yes
  - Go To 3
  No
  - Diagnose and repair the Batteries and charging system before continuing.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK THE PM SENSOR POWER AND GROUND CIRCUITS
1. Turn the ignition on, engine not running.
2. Disconnect the PM Sensor harness connector.
3. Measure the voltage across the SCR Relay 2 (F205) Output circuit and the (Z915) Ground circuit at the PM Sensor harness connector.
  Does the voltage read within 1.0 volt of Battery voltage?
  
  Yes
  - Replace the Particulate Matter (PM) Sensor in accordance with the Service Information. Refer to SENSOR, PARTICULATE MATTER, REMOVAL AND INSTALLATION .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 4
CHECK FOR VOLTAGE AT THE SCR RELAY 2 (F205) OUTPUT CIRCUIT
1. Turn the ignition on.
2. Measure the voltage between ground and the SCR Relay 2 (F205) Output circuit at the PM Sensor harness connector.
  Does the voltage read within 1.0 volt of Battery voltage?
  
  Yes
  - Repair the (Z915) Ground circuit for a short to voltage or an open/high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Repair the SCR Relay 2 (F205) Output circuit for a short to voltage.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .